Now here's the tricky part to try to explain. Accordian fold it, but in a circle, if that makes sense. You need to curve it as you fold so it forms a circle. If you get to the end of the strip of paper and need more, just glue on another piece.
When you get back to the begining of the circle, glue or staple it together.
And your medallions are finished! Now what can you use them for, you ask?
Have fun crafting! ♥